Comparator Waveform Fault Detection for Real-Time Control Protection
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Solution Overview
Problem
Industrial control systems face challenges in efficiently detecting and responding to fault conditions in real-time without overburdening the host processor, particularly in applications like motor control and power factor control, where power efficiency and fast response are crucial.
Innovation Solution
A protection waveform memory and comparator waveform generator system that generates protection waveforms independently from the host processor, allowing for real-time fault detection and intervention through comparator waveform generators that compare measured system characteristics with stored waveforms, triggering protective actions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the host processor is used to detect and respond to fault conditions in real-time, then the system can perform comprehensive analysis, but the processing burden on the host processor increases and response latency increases
Solution Approach 1:
The system divides fault detection functionality into two segments: a protection waveform generator that creates reference waveforms, and a comparator waveform generator that performs real-time comparison with measured waveforms. This segmentation offloads critical real-time comparison tasks from the host processor to dedicated hardware circuits, reducing processing burden while maintaining reliable fault detection.
Solution Approach 2:
The patent introduces a dedicated comparator waveform generator as an intermediary component between the host processor and the fault detection process. This intermediary handles real-time waveform comparison and generates fault interrupts independently, allowing the host processor to focus on higher-level control tasks while maintaining fast fault response.
2Reliability
If the host processor handles all real-time fault detection tasks, then comprehensive monitoring is achieved, but response time increases due to processor scheduling and other tasks
Solution Approach 1:
The protection waveform generator pre-generates and stores reference waveforms in memory before they are needed for comparison. This preliminary action allows the comparator waveform generator to immediately compare incoming measured waveforms against pre-prepared reference data without waiting for processor computation, significantly reducing fault response time.
Solution Approach 2:
The patent replaces the software-based fault detection mechanism (running on the host processor) with a hardware-based comparator waveform generator that performs real-time analog or digital comparison. This substitution eliminates processor scheduling delays and provides deterministic fast response to fault conditions.
3Measurement precision
If more processing power is allocated to fault detection, then detection accuracy improves, but power consumption increases
Solution Approach 1:
The comparator waveform generator operates autonomously using dedicated hardware circuits that continuously compare measured waveforms against reference waveforms without requiring active processor intervention. This self-service approach maintains high detection accuracy through dedicated comparison logic while consuming minimal power compared to running intensive processing algorithms on the host processor.
Solution Approach 2:
The system uses simple, low-power comparator circuits and lookup table-based reference waveforms instead of complex processing algorithms. These lightweight hardware components provide sufficient fault detection accuracy for critical functions while maintaining low power consumption, suitable for cost-sensitive and power-constrained industrial applications.
Data Source
AI summary
According to some embodiments, a system comprises a memory configured to store protection waveform data, and a comparator waveform generator configured to access the memory to generate a protection waveform from the protection waveform data based on a trigger associated with the system, receive a measured system characteristic waveform, and generate a fault interrupt responsive to a comparison between the measured system characteristic waveform and the protection waveform violating a fault condition.